/Engine/Source/Runtime/Core/Public/Templates/SharedPointer.h
Constructs a shared reference as a reference to an existing shared reference's object. This constructor is needed so that we can implicitly upcast to base classes.
template<typename OtherType, typename> TSharedRef ( [TSharedRef](API\Runtime\Core\Templates\TSharedRef)< OtherType, Mode > const & InSharedRef )